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class="menus_item_child"><li><a class="site-page" href="/about/"><i class="fa-fw fas fa-rocket"></i><span> 我</span></a></li><li><a class="site-page" target="_blank" rel="noopener" href="https://shenshilei1022.avosapps.us/"><i class="fa-fw fas fa-list-alt"></i><span> 评论管理</span></a></li><li><a class="site-page" target="_blank" rel="noopener" href="http://bt.shenshilei.site:8888/shenshilei"><i class="fa-fw fas fa-window-maximize"></i><span> 服务器管理</span></a></li><li><a class="site-page" target="_blank" rel="noopener" href="https://console.leancloud.app/applist.html#/apps"><i class="fa-fw fas fa-window-restore"></i><span> leancloud应用</span></a></li></ul></div></div><span class="close" id="toggle-menu"><a class="site-page"><i class="fas fa-bars fa-fw"></i></a></span></span></nav><div id="post-info"><h1 class="post-title">使用QQ音乐Api批量下载音乐</h1><div id="post-meta"><div class="meta-firstline"><span class="post-meta-date"><i class="far fa-calendar-alt fa-fw post-meta-icon"></i><span class="post-meta-label">发表于</span><time class="post-meta-date-created" datetime="2020-05-22T12:54:03.000Z" title="发表于 2020-05-22 20:54:03">2020-05-22</time><span class="post-meta-separator">|</span><i class="fas fa-history fa-fw post-meta-icon"></i><span class="post-meta-label">更新于</span><time class="post-meta-date-updated" datetime="2020-07-05T12:16:22.000Z" title="更新于 2020-07-05 20:16:22">2020-07-05</time></span><span class="post-meta-categories"><span class="post-meta-separator">|</span><i class="fas fa-inbox fa-fw post-meta-icon"></i><a class="post-meta-categories" href="/categories/Java/">Java</a><i class="fas fa-angle-right post-meta-separator"></i><i class="fas fa-inbox fa-fw post-meta-icon"></i><a class="post-meta-categories" href="/categories/Java/%E5%AE%9E%E6%88%98/">实战</a></span></div><div class="meta-secondline"> <span class="post-meta-separator">|</span><span class="post-meta-wordcount"><i class="far fa-file-word fa-fw post-meta-icon"></i><span class="post-meta-label">字数总计:</span><span class="word-count">2.2k</span><span class="post-meta-separator">|</span><i class="far fa-clock fa-fw post-meta-icon"></i><span class="post-meta-label">阅读时长:</span><span>10分钟</span></span><span class="post-meta-separator">|</span><span class="post-meta-pv-cv"><i class="far fa-eye fa-fw post-meta-icon"></i><span class="post-meta-label">阅读量:</span><span id="busuanzi_value_page_pv"></span></span><span class="post-meta-separator">|</span><span class="post-meta-commentcount"><i class="far fa-comments fa-fw post-meta-icon"></i><span class="post-meta-label">评论数:</span><a href="/post/3da9/#post-comment" itemprop="discussionUrl"><span class="valine-comment-count comment-count" data-xid="/post/3da9/" itemprop="commentCount"></span></a></span></div></div></div></header><main class="layout" id="content-inner"><div id="post"><article class="post-content" id="article-container"><p>最近在Github上看到一个项目，使用Vue搭建了一个Web播放器，可以播放一些需要vip的歌曲——<a target="_blank" rel="noopener" href="https://github.com/jsososo/NeteaseMusic">NetEasyMusic</a>.</p>
<p><img src="https://gitee.com/shenshilei1022/hugo_image_resource/raw/master/imgs/121.jpg" alt=""></p>
<p>想从上面下载一些杰伦的歌😁。无奈，杰伦的歌太多了，所以利用它所使用的QQ音乐Api，自己写了一个Java程序来批量下载歌曲。</p>
<blockquote>
<p>本项目仅供学习使用，请尊重版权，请勿利用此项目从事商业行为! 本项目仅供学习使用，请尊重版权，请勿利用此项目从事商业行为! 本项目仅供学习使用，请尊重版权，请勿利用此项目从事商业行为!</p>
</blockquote>
<p>所需技术:</p>
<blockquote>
<ol>
<li>JSON对象的处理</li>
<li>HttpURLConnection获取网络资源</li>
</ol>
</blockquote>
<h2 id="1-QQ音乐Api"><a href="#1-QQ音乐Api" class="headerlink" title="1. QQ音乐Api"></a>1. QQ音乐Api</h2><p>请大家移步<a target="_blank" rel="noopener" href="https://jsososo.github.io/QQMusicApi/#/">QQ音乐Api</a></p>
<p>因为我这里的目的是下载歌曲，所以关系的接口是</p>
<ol>
<li>搜索</li>
</ol>
<p><img src="https://gitee.com/shenshilei1022/hugo_image_resource/raw/master/imgs/122.jpg" alt=""></p>
<ol>
<li>下载链接</li>
</ol>
<p><img src="https://gitee.com/shenshilei1022/hugo_image_resource/raw/master/imgs/123.jpg" alt=""></p>
<p><strong>注意这里的完整链接是<a target="_blank" rel="noopener" href="https://api.qq.jsososo.com/search?key=周杰伦">https://api.qq.jsososo.com/search?key=周杰伦</a></strong></p>
<h2 id="2-流程"><a href="#2-流程" class="headerlink" title="2. 流程"></a>2. 流程</h2><p><img src="https://gitee.com/shenshilei1022/hugo_image_resource/raw/master/imgs/125.jpg" alt=""></p>
<h2 id="3-实现"><a href="#3-实现" class="headerlink" title="3. 实现"></a>3. 实现</h2><h3 id="3-1-获取关键字"><a href="#3-1-获取关键字" class="headerlink" title="3.1 获取关键字"></a>3.1 获取关键字</h3><p>新建BootStrap类作为程序入口</p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> java.util.Scanner;</span><br><span class="line"></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">BootStrap</span> </span>&#123;</span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">main</span><span class="params">(String[] args)</span> <span class="keyword">throws</span> IOException</span>&#123;</span><br><span class="line">        Scanner sc = <span class="keyword">new</span> Scanner(System.in);</span><br><span class="line">        System.out.println(<span class="string">&quot;请输入歌名或歌手关键字：&quot;</span>);</span><br><span class="line">        String keyword = sc.next();</span><br><span class="line">        <span class="comment">// Crawl类下面会说到。</span></span><br><span class="line">        <span class="keyword">new</span> Crawl().crawlMusic(keyword);</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<h3 id="3-2-根据关键字构造URL"><a href="#3-2-根据关键字构造URL" class="headerlink" title="3.2 根据关键字构造URL"></a>3.2 根据关键字构造URL</h3><p>使用字符串拼接即可，代码和3.3放在一起。</p>
<h3 id="3-3-从返回的JSON数据中获取歌曲的下载ID"><a href="#3-3-从返回的JSON数据中获取歌曲的下载ID" class="headerlink" title="3.3 从返回的JSON数据中获取歌曲的下载ID"></a>3.3 从返回的JSON数据中获取歌曲的下载ID</h3><p>新建Crawl类，并新建crawlMusic方法</p>
<p>引入jsoup包，maven设置为</p>
<figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">dependency</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">groupId</span>&gt;</span>org.jsoup<span class="tag">&lt;/<span class="name">groupId</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">artifactId</span>&gt;</span>jsoup<span class="tag">&lt;/<span class="name">artifactId</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">version</span>&gt;</span>1.10.2<span class="tag">&lt;/<span class="name">version</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">dependency</span>&gt;</span></span><br></pre></td></tr></table></figure>
<p><strong>这里使用jsoup获取网页响应(注意不是DOM对象)，需要忽略格式，并执行execute方法，再获取response的body</strong></p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">crawlMusic</span><span class="params">(String keyword)</span> <span class="keyword">throws</span> IOException</span>&#123;</span><br><span class="line">    String url = String url = <span class="string">&quot;https://api.qq.jsososo.com/search?key=&quot;</span> + key;</span><br><span class="line">    Response res = jsoup.connect(url).ignoreContentType(<span class="keyword">true</span>).execute();</span><br><span class="line">    String body = res.body();</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<p>接下来需要对JSON对象进行操作，引入fastjson，maven设置为</p>
<figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">dependency</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">groupId</span>&gt;</span>com.alibaba<span class="tag">&lt;/<span class="name">groupId</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">artifactId</span>&gt;</span>fastjson<span class="tag">&lt;/<span class="name">artifactId</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">version</span>&gt;</span>1.2.28<span class="tag">&lt;/<span class="name">version</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">dependency</span>&gt;</span></span><br></pre></td></tr></table></figure>
<p><strong>将字符串转换为JSON对象，使用JSONObject静态方法parseObject</strong></p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">crawlMusic</span><span class="params">(String keyword)</span> <span class="keyword">throws</span> IOException</span>&#123;</span><br><span class="line">    String url = String url = <span class="string">&quot;https://api.qq.jsososo.com/search?key=&quot;</span> + key;</span><br><span class="line">    Response res = jsoup.connect(url).ignoreContentType(<span class="keyword">true</span>).execute();</span><br><span class="line">    String body = res.body();</span><br><span class="line"></span><br><span class="line">    <span class="comment">// 处理JSON对象</span></span><br><span class="line">    JSONObject json = JSONObject.parseObject(body);</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<p>到这里，先分析一下JSON数据的格式。</p>
<p>发现提交搜索请求之后，返回的JSON数据中，只要取data的值，再取list值就可以得到歌曲信息的JSON列表。</p>
<p>然后分析列表中的元素</p>
<p><img src="https://gitee.com/shenshilei1022/hugo_image_resource/raw/master/imgs/126.jpg" alt=""></p>
<p>这里先达到目的就先提取下载ID的值就可以了。</p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">crawlMusic</span><span class="params">(String keyword)</span> <span class="keyword">throws</span> IOException</span>&#123;</span><br><span class="line">    String url = String url = <span class="string">&quot;https://api.qq.jsososo.com/search?key=&quot;</span> + key;</span><br><span class="line">    Response res = jsoup.connect(url).ignoreContentType(<span class="keyword">true</span>).execute();</span><br><span class="line">    String body = res.body();</span><br><span class="line"></span><br><span class="line">    <span class="comment">// 处理JSON对象</span></span><br><span class="line">    JSONObject json = JSONObject.parseObject(body);</span><br><span class="line">    JSONObject data = json.getJSONObject(<span class="string">&quot;data&quot;</span>);</span><br><span class="line">    JSONArray list = data.getJSONArray(<span class="string">&quot;list&quot;</span>);</span><br><span class="line">    <span class="comment">// 获取下载ID (注意这里不要用增强for)</span></span><br><span class="line">    <span class="keyword">for</span> (<span class="keyword">int</span> i = <span class="number">0</span>; i &lt; list.size(); i++) &#123;</span><br><span class="line">        String downloadApi = list.getJSONObject(i).getString(<span class="string">&quot;songmid&quot;</span>);</span><br><span class="line">        String downloadURL = downloadURL(downloadApi);</span><br><span class="line">        downloadMusic(downloadURL);</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<h3 id="3-4-根据下载ID构造URL下载歌曲"><a href="#3-4-根据下载ID构造URL下载歌曲" class="headerlink" title="3.4 根据下载ID构造URL下载歌曲"></a>3.4 根据下载ID构造URL下载歌曲</h3><p>现在来完成downloadURL和downloadMusic两个方法。</p>
<p>downloadURL通过下载ID构造链接，请求到歌曲的真正下载链接。</p>
<p><img src="https://gitee.com/shenshilei1022/hugo_image_resource/raw/master/imgs/127.jpg" alt=""></p>
<p>data的值即是真正的下载链接。</p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">public</span> String <span class="title">downloadURL</span><span class="params">(String downloadApi)</span> </span>&#123;</span><br><span class="line">    String downloadApi = <span class="string">&quot;https://api.qq.jsososo.com/song/url?id=&quot;</span> + downloadApi;</span><br><span class="line">    Response res = jsoup.connect(downloadApi).ignoreContentType(<span class="keyword">true</span>).execute();</span><br><span class="line">    String body = res.body();</span><br><span class="line">    JSONObject json = JSONObject.parseObject(body);</span><br><span class="line">    <span class="keyword">return</span> json.getString(<span class="string">&quot;data&quot;</span>);</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<p>根据真正下载链接下载歌曲，这里的流程是这样的</p>
<ol>
<li>新建URL对象。</li>
<li>建立连接HttpURLConnection。</li>
<li>获取网络输入流。</li>
<li>通过缓存流写入到输出流当中。</li>
<li>关闭流，关闭连接。</li>
</ol>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">downloadMusic</span><span class="params">(String url)</span> </span>&#123;</span><br><span class="line">    String path = <span class="string">&quot;D:\\&quot;</span>;</span><br><span class="line">    FileOutputStream fileOut = <span class="keyword">null</span>;</span><br><span class="line">    HttpURLConnection con = <span class="keyword">null</span>;</span><br><span class="line">    InputStream inputStream = <span class="keyword">null</span>;</span><br><span class="line"></span><br><span class="line">    <span class="keyword">try</span> &#123;</span><br><span class="line">        <span class="comment">// 建立URL对象</span></span><br><span class="line">        URL httpUrl = <span class="keyword">new</span> URL(url);</span><br><span class="line">        <span class="comment">// 建立连接</span></span><br><span class="line">        con = (HttpURLConnection) httpUrl.openConnection();</span><br><span class="line">        con.connect();</span><br><span class="line">        <span class="comment">// 获取网络输入流</span></span><br><span class="line">        inputStream = con.getInputStream();</span><br><span class="line">        <span class="comment">// 建立缓存流写入文件</span></span><br><span class="line">        BufferedInputStream bis = <span class="keyword">new</span> BufferedInputStream(inputStream);</span><br><span class="line">        fileOut = <span class="keyword">new</span> FileOutputStream(path+<span class="string">&quot;song.mp3&quot;</span>);</span><br><span class="line">        BufferedOutputStream bos = <span class="keyword">new</span> BufferedOutputStream(fileOut);</span><br><span class="line">        <span class="comment">// 新建缓存字节数组用来传递数据</span></span><br><span class="line">        <span class="keyword">byte</span>[] buf = <span class="keyword">new</span> <span class="keyword">byte</span>[<span class="number">4096</span>];</span><br><span class="line">        <span class="keyword">int</span> length = bis.read(buf);</span><br><span class="line">        <span class="keyword">while</span> (length != -<span class="number">1</span>) &#123;</span><br><span class="line">            bos.write(buf, <span class="number">0</span>, length);</span><br><span class="line">            length = bis.read(buf);</span><br><span class="line">        &#125;</span><br><span class="line">        <span class="comment">// 关闭流和连接</span></span><br><span class="line">        bos.close();</span><br><span class="line">        bis.close();</span><br><span class="line">        con.disconnect();</span><br><span class="line">    &#125; <span class="keyword">catch</span> (Exception e) &#123;</span><br><span class="line">        e.printStackTrace();</span><br><span class="line">    &#125; <span class="keyword">finally</span> &#123;</span><br><span class="line">        System.out.println(<span class="string">&quot;下载完毕！&quot;</span>);</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<p>到此，整个根据关键字下载歌曲的程序就基本写完了，可以运行BootStrap来下载歌曲啦😀</p>
<h2 id="4-优化"><a href="#4-优化" class="headerlink" title="4. 优化"></a>4. 优化</h2><p>以上完成了下载歌曲的程序，但没有在控制台输出歌曲信息，而且我把下载歌曲的名字写死了，这样很不方便。另外也没有跳转下一页的功能，所以我优化了一下，完整代码如下。</p>
<p>新增功能</p>
<blockquote>
<ul>
<li>根据需要选择下载的歌曲。</li>
<li>询问是否查看下一页歌曲。</li>
<li>默认下载flac音质，没有flac源则下载mp3格式音乐。</li>
<li>设置歌曲名为下载文件名。</li>
</ul>
</blockquote>
<p><em>BootStrap.java</em></p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> com.ssl;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> java.io.IOException;</span><br><span class="line"><span class="keyword">import</span> java.util.Scanner;</span><br><span class="line"></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">Bootstrap</span> </span>&#123;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">main</span><span class="params">(String[] args)</span> <span class="keyword">throws</span> IOException </span>&#123;</span><br><span class="line">        Scanner sc = <span class="keyword">new</span> Scanner(System.in);</span><br><span class="line">        System.out.println(<span class="string">&quot;请输入歌名或歌手：&quot;</span>);</span><br><span class="line">        String keyword = sc.next();</span><br><span class="line">        <span class="keyword">int</span> pageNo = <span class="number">1</span>;</span><br><span class="line">        <span class="keyword">while</span> (<span class="keyword">true</span>) &#123;</span><br><span class="line">            <span class="keyword">new</span> Crawl().crawlMusic(keyword, pageNo);</span><br><span class="line">            System.out.println(<span class="string">&quot;是否查看下一页歌曲？(y/n): &quot;</span>);</span><br><span class="line">            String select = sc.next();</span><br><span class="line">            <span class="keyword">if</span> (<span class="string">&quot;y&quot;</span>.equals(select)) &#123;</span><br><span class="line">                pageNo++;</span><br><span class="line">                System.out.println(<span class="string">&quot;查看下一页歌曲~&quot;</span>);</span><br><span class="line">            &#125; <span class="keyword">else</span> &#123;</span><br><span class="line">                System.out.println(<span class="string">&quot;欢迎下次再会~&quot;</span>);</span><br><span class="line">                <span class="keyword">break</span>;</span><br><span class="line">            &#125;</span><br><span class="line">        &#125;</span><br><span class="line"></span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<p><em>Crawl.java</em></p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br><span class="line">95</span><br><span class="line">96</span><br><span class="line">97</span><br><span class="line">98</span><br><span class="line">99</span><br><span class="line">100</span><br><span class="line">101</span><br><span class="line">102</span><br><span class="line">103</span><br><span class="line">104</span><br><span class="line">105</span><br><span class="line">106</span><br><span class="line">107</span><br><span class="line">108</span><br><span class="line">109</span><br><span class="line">110</span><br><span class="line">111</span><br><span class="line">112</span><br><span class="line">113</span><br><span class="line">114</span><br><span class="line">115</span><br><span class="line">116</span><br><span class="line">117</span><br><span class="line">118</span><br><span class="line">119</span><br><span class="line">120</span><br><span class="line">121</span><br><span class="line">122</span><br><span class="line">123</span><br><span class="line">124</span><br><span class="line">125</span><br><span class="line">126</span><br><span class="line">127</span><br><span class="line">128</span><br><span class="line">129</span><br><span class="line">130</span><br><span class="line">131</span><br><span class="line">132</span><br><span class="line">133</span><br><span class="line">134</span><br><span class="line">135</span><br><span class="line">136</span><br><span class="line">137</span><br><span class="line">138</span><br><span class="line">139</span><br><span class="line">140</span><br><span class="line">141</span><br><span class="line">142</span><br><span class="line">143</span><br><span class="line">144</span><br><span class="line">145</span><br><span class="line">146</span><br><span class="line">147</span><br><span class="line">148</span><br><span class="line">149</span><br><span class="line">150</span><br><span class="line">151</span><br><span class="line">152</span><br><span class="line">153</span><br><span class="line">154</span><br><span class="line">155</span><br><span class="line">156</span><br><span class="line">157</span><br><span class="line">158</span><br><span class="line">159</span><br><span class="line">160</span><br><span class="line">161</span><br><span class="line">162</span><br><span class="line">163</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> com.ssl;</span><br><span class="line"></span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> com.alibaba.fastjson.JSONArray;</span><br><span class="line"><span class="keyword">import</span> com.alibaba.fastjson.JSONObject;</span><br><span class="line"><span class="keyword">import</span> org.jsoup.Connection.Response;</span><br><span class="line"><span class="keyword">import</span> org.jsoup.Jsoup;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> java.io.*;</span><br><span class="line"><span class="keyword">import</span> java.net.HttpURLConnection;</span><br><span class="line"><span class="keyword">import</span> java.net.URL;</span><br><span class="line"><span class="keyword">import</span> java.util.*;</span><br><span class="line"></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">Crawl</span> </span>&#123;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">crawlMusic</span><span class="params">(String key, <span class="keyword">int</span> pageNo)</span> <span class="keyword">throws</span> IOException </span>&#123;</span><br><span class="line">        String url = <span class="string">&quot;https://api.qq.jsososo.com/search?key=&quot;</span> + key + <span class="string">&quot;&amp;pageNo=&quot;</span> + pageNo;</span><br><span class="line">        Response res = Jsoup.connect(url).ignoreContentType(<span class="keyword">true</span>).execute();</span><br><span class="line">        String body = res.body();</span><br><span class="line">        JSONObject json = JSONObject.parseObject(body);</span><br><span class="line">        JSONObject data = json.getJSONObject(<span class="string">&quot;data&quot;</span>);</span><br><span class="line">        JSONArray list = data.getJSONArray(<span class="string">&quot;list&quot;</span>);</span><br><span class="line"></span><br><span class="line">        <span class="comment">// 创建字典储存歌曲</span></span><br><span class="line">        Map&lt;Integer, List&gt; getSong = <span class="keyword">new</span> HashMap&lt;&gt;();</span><br><span class="line"></span><br><span class="line">        <span class="keyword">for</span> (<span class="keyword">int</span> i = <span class="number">0</span>; i &lt; list.size(); i++) &#123;</span><br><span class="line">            JSONObject songInfo = list.getJSONObject(i);</span><br><span class="line">            <span class="comment">// 歌曲名+歌手</span></span><br><span class="line">            String songName = getSongName(songInfo);</span><br><span class="line">            String singer = getSinger(songInfo);</span><br><span class="line">            <span class="comment">// 歌曲下载Api</span></span><br><span class="line">            String downloadUrl = getDownloadApi(songInfo);</span><br><span class="line">            <span class="comment">// 歌曲下载类型</span></span><br><span class="line">            <span class="keyword">int</span> sizeflac = getSizeFlac(songInfo);</span><br><span class="line">            <span class="comment">// 先将歌曲和链接储存到列表中</span></span><br><span class="line">            List&lt;String&gt; getSongSub = saveSong(songName, singer, downloadUrl, String.valueOf(sizeflac));</span><br><span class="line">            <span class="comment">// 放入字典</span></span><br><span class="line">            getSong.put(i+<span class="number">1</span>, getSongSub);</span><br><span class="line">        &#125;</span><br><span class="line">        <span class="comment">// 选择歌曲下载</span></span><br><span class="line">        selectMusic(getSong);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> String <span class="title">getDownloadApi</span><span class="params">(JSONObject o)</span> </span>&#123;</span><br><span class="line">        String downloadApi = <span class="string">&quot;https://api.qq.jsososo.com/song/url?id=&quot;</span> + o.getString(<span class="string">&quot;songmid&quot;</span>);</span><br><span class="line">        <span class="keyword">return</span> downloadApi;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> String <span class="title">getSongName</span><span class="params">(JSONObject o)</span> </span>&#123;</span><br><span class="line">        <span class="keyword">return</span> o.getString(<span class="string">&quot;songname&quot;</span>);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">int</span> <span class="title">getSizeFlac</span><span class="params">(JSONObject o)</span> </span>&#123;</span><br><span class="line">        <span class="keyword">return</span> o.getInteger(<span class="string">&quot;sizeflac&quot;</span>);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> String <span class="title">getSinger</span><span class="params">(JSONObject o)</span> </span>&#123;</span><br><span class="line">        <span class="keyword">return</span> o.getJSONArray(<span class="string">&quot;singer&quot;</span>).getJSONObject(<span class="number">0</span>).getString(<span class="string">&quot;name&quot;</span>);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">goThroughMap</span><span class="params">(Map map)</span> </span>&#123;</span><br><span class="line">        <span class="comment">// 遍历HashMap</span></span><br><span class="line">        Set&lt;Integer&gt; indexSet = map.keySet();</span><br><span class="line">        <span class="keyword">for</span> (<span class="keyword">int</span> index: indexSet) &#123;</span><br><span class="line">            System.out.println(index + <span class="string">&quot;, &quot;</span> + map.get(index).toString());</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> List <span class="title">saveSong</span><span class="params">(String... s)</span> </span>&#123;</span><br><span class="line">        List&lt;String&gt; getSongSub = <span class="keyword">new</span> ArrayList&lt;&gt;();</span><br><span class="line">        <span class="keyword">for</span> (String s1: s) &#123;</span><br><span class="line">            getSongSub.add(s1);</span><br><span class="line">        &#125;</span><br><span class="line">        <span class="keyword">return</span> getSongSub;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> String <span class="title">getDownloadUrl</span><span class="params">(String downloadApi)</span> <span class="keyword">throws</span> IOException</span>&#123;</span><br><span class="line">        Response res = Jsoup.connect(downloadApi).ignoreContentType(<span class="keyword">true</span>).execute();</span><br><span class="line">        String body = res.body();</span><br><span class="line">        JSONObject json = JSONObject.parseObject(body);</span><br><span class="line">        System.out.println(json.getString(<span class="string">&quot;data&quot;</span>));</span><br><span class="line">        <span class="keyword">return</span> json.getString(<span class="string">&quot;data&quot;</span>);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">selectMusic</span><span class="params">(Map map)</span> </span>&#123;</span><br><span class="line">        goThroughMap(map);</span><br><span class="line">        Scanner sc = <span class="keyword">new</span> Scanner(System.in);</span><br><span class="line">        System.out.println(<span class="string">&quot;请输入想要下载音乐对应的序号：(如果输入0，则下载以上全部歌曲; 输入-1，则不下载当前页面歌曲。)&quot;</span>);</span><br><span class="line">        <span class="keyword">int</span> index = sc.nextInt();</span><br><span class="line">        <span class="keyword">if</span> (<span class="number">0</span> &lt; index) &#123;</span><br><span class="line">            download(map, index);</span><br><span class="line">        &#125; <span class="keyword">else</span> <span class="keyword">if</span> (<span class="number">0</span> == index) &#123;</span><br><span class="line">            <span class="keyword">for</span> (<span class="keyword">int</span> i = <span class="number">1</span>; i &lt;= map.size(); i++) &#123;</span><br><span class="line">                download(map, i);</span><br><span class="line">            &#125;</span><br><span class="line">        &#125; <span class="keyword">else</span> &#123;</span><br><span class="line">            System.out.println(<span class="string">&quot;不下载当前页歌曲！&quot;</span>);</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">downloadSong</span><span class="params">(String url, String songName, String format)</span> </span>&#123;</span><br><span class="line">        String path = <span class="string">&quot;D:\\Media\\Music\\&quot;</span>;</span><br><span class="line">        FileOutputStream fileOut = <span class="keyword">null</span>;</span><br><span class="line">        HttpURLConnection con = <span class="keyword">null</span>;</span><br><span class="line">        InputStream inputStream = <span class="keyword">null</span>;</span><br><span class="line"></span><br><span class="line">        <span class="keyword">try</span> &#123;</span><br><span class="line">            <span class="comment">// 建立连接</span></span><br><span class="line">            URL httpUrl = <span class="keyword">new</span> URL(url);</span><br><span class="line">            con = (HttpURLConnection) httpUrl.openConnection();</span><br><span class="line">            <span class="comment">// 连接指定的资源</span></span><br><span class="line">            con.connect();</span><br><span class="line">            System.out.println(<span class="string">&quot;正在下载中...&quot;</span>);</span><br><span class="line">            <span class="comment">// 获取网络输入流</span></span><br><span class="line">            inputStream = con.getInputStream();</span><br><span class="line">            BufferedInputStream bis = <span class="keyword">new</span> BufferedInputStream(inputStream);</span><br><span class="line">            <span class="comment">// 写入到文件</span></span><br><span class="line">            fileOut = <span class="keyword">new</span> FileOutputStream(path + songName + <span class="string">&quot;.&quot;</span> + format);</span><br><span class="line">            BufferedOutputStream bos = <span class="keyword">new</span> BufferedOutputStream(fileOut);</span><br><span class="line"></span><br><span class="line">            <span class="keyword">byte</span>[] buf = <span class="keyword">new</span> <span class="keyword">byte</span>[<span class="number">4096</span>];</span><br><span class="line">            <span class="keyword">int</span> length = bis.read(buf);</span><br><span class="line">            <span class="comment">//保存文件</span></span><br><span class="line">            <span class="keyword">while</span>(length != -<span class="number">1</span>)</span><br><span class="line">            &#123;</span><br><span class="line">                bos.write(buf, <span class="number">0</span>, length);</span><br><span class="line">                length = bis.read(buf);</span><br><span class="line">            &#125;</span><br><span class="line">            bos.close();</span><br><span class="line">            bis.close();</span><br><span class="line">            con.disconnect();</span><br><span class="line"></span><br><span class="line">        &#125; <span class="keyword">catch</span> (Exception e) &#123;</span><br><span class="line">            e.printStackTrace();</span><br><span class="line">        &#125; <span class="keyword">finally</span> &#123;</span><br><span class="line">            System.out.println(<span class="string">&quot;下载完毕！&quot;</span>);</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">download</span><span class="params">(Map map, <span class="keyword">int</span> index)</span> </span>&#123;</span><br><span class="line">        List songInfo = (List) map.get(index);</span><br><span class="line">        String downloadApi = (String) songInfo.get(<span class="number">2</span>);</span><br><span class="line">        String sizeFlac = (String) songInfo.get(<span class="number">3</span>);</span><br><span class="line">        System.out.format(<span class="string">&quot;下载的歌曲是：%s \n&quot;</span>, songInfo.get(<span class="number">0</span>).toString());</span><br><span class="line">        <span class="keyword">try</span> &#123;</span><br><span class="line">            <span class="comment">// 如果sizeFlac为0，则下载MP3格式文件; 否则下载flac格式文件</span></span><br><span class="line">            <span class="keyword">if</span> (<span class="string">&quot;0&quot;</span>.equals(sizeFlac)) &#123;</span><br><span class="line">                String downloadUrl = getDownloadUrl(downloadApi);</span><br><span class="line">                System.out.println(<span class="string">&quot;下载mp3歌曲&quot;</span>);</span><br><span class="line">                downloadSong(downloadUrl, (String) songInfo.get(<span class="number">0</span>), <span class="string">&quot;mp3&quot;</span>);</span><br><span class="line">            &#125; <span class="keyword">else</span> &#123;</span><br><span class="line">                String downloadUrl = getDownloadUrl(downloadApi + <span class="string">&quot;&amp;type=flac&quot;</span>);</span><br><span class="line">                System.out.println(<span class="string">&quot;下载flac歌曲&quot;</span>);</span><br><span class="line">                downloadSong(downloadUrl, (String) songInfo.get(<span class="number">0</span>), <span class="string">&quot;flac&quot;</span>);</span><br><span class="line">            &#125;</span><br><span class="line"></span><br><span class="line">        &#125; <span class="keyword">catch</span> (IOException e) &#123;</span><br><span class="line">            e.printStackTrace();</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<p>使用过程</p>
<p><img src="https://gitee.com/shenshilei1022/hugo_image_resource/raw/master/imgs/130.gif" alt=""></p>
<blockquote>
<p>没有采用多线程，怕大佬的服务器扛不住，也怕封我的IP😂，可以听杰伦就好啦，要什么自行车~<br>一定不要商用！<br>下载其他歌手的歌也行哈。</p>
</blockquote>
</article><div class="post-copyright"><div class="post-copyright__author"><span class="post-copyright-meta">文章作者: </span><span class="post-copyright-info"><a href="mailto:undefined">Shen Shilei</a></span></div><div class="post-copyright__type"><span class="post-copyright-meta">文章链接: </span><span class="post-copyright-info"><a href="https://blog.shenshilei.site/post/3da9/">https://blog.shenshilei.site/post/3da9/</a></span></div><div class="post-copyright__notice"><span class="post-copyright-meta">版权声明: </span><span class="post-copyright-info">本博客所有文章除特别声明外，均采用 <a href="https://creativecommons.org/licenses/by-nc-sa/4.0/" target="_blank">CC BY-NC-SA 4.0</a> 许可协议。转载请注明来自 <a href="https://blog.shenshilei.site" target="_blank">ShenShilei's Blog</a>！</span></div></div><div class="tag_share"><div class="post-meta__tag-list"><a class="post-meta__tags" href="/tags/Java/">Java</a><a class="post-meta__tags" href="/tags/%E9%9F%B3%E4%B9%90/">音乐</a></div><div class="post_share"><div 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QQ音乐Api</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#2-%E6%B5%81%E7%A8%8B"><span class="toc-text">2. 流程</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#3-%E5%AE%9E%E7%8E%B0"><span class="toc-text">3. 实现</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#3-1-%E8%8E%B7%E5%8F%96%E5%85%B3%E9%94%AE%E5%AD%97"><span class="toc-text">3.1 获取关键字</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#3-2-%E6%A0%B9%E6%8D%AE%E5%85%B3%E9%94%AE%E5%AD%97%E6%9E%84%E9%80%A0URL"><span class="toc-text">3.2 根据关键字构造URL</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#3-3-%E4%BB%8E%E8%BF%94%E5%9B%9E%E7%9A%84JSON%E6%95%B0%E6%8D%AE%E4%B8%AD%E8%8E%B7%E5%8F%96%E6%AD%8C%E6%9B%B2%E7%9A%84%E4%B8%8B%E8%BD%BDID"><span class="toc-text">3.3 从返回的JSON数据中获取歌曲的下载ID</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#3-4-%E6%A0%B9%E6%8D%AE%E4%B8%8B%E8%BD%BDID%E6%9E%84%E9%80%A0URL%E4%B8%8B%E8%BD%BD%E6%AD%8C%E6%9B%B2"><span class="toc-text">3.4 根据下载ID构造URL下载歌曲</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#4-%E4%BC%98%E5%8C%96"><span class="toc-text">4. 优化</span></a></li></ol></div></div></div><div class="card-widget card-recent-post"><div class="card-content"><div class="item-headline"><i class="fas fa-history"></i><span>最新文章</span></div><div class="aside-list"><div class="aside-list-item"><a class="thumbnail" href="/post/ceb5/" title="在Deepin上安装Eclipse"><img src="https://gitee.com/shenshilei1022/hugo_image_resource/raw/master/imgs/20210911113215.jpg" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="在Deepin上安装Eclipse"/></a><div class="content"><a class="title" href="/post/ceb5/" title="在Deepin上安装Eclipse">在Deepin上安装Eclipse</a><time datetime="2021-09-11T02:46:06.000Z" title="发表于 2021-09-11 10:46:06">2021-09-11</time></div></div><div class="aside-list-item"><a class="thumbnail" href="/post/6b0/" title="使用VMware创建CentOS7.6虚拟机"><img src="https://gitee.com/shenshilei1022/hugo_image_resource/raw/master/imgs/centos-motif.png" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="使用VMware创建CentOS7.6虚拟机"/></a><div class="content"><a class="title" href="/post/6b0/" title="使用VMware创建CentOS7.6虚拟机">使用VMware创建CentOS7.6虚拟机</a><time datetime="2021-03-07T14:56:59.000Z" title="发表于 2021-03-07 22:56:59">2021-03-07</time></div></div><div class="aside-list-item"><a class="thumbnail" href="/post/1ea5/" title="前端练习-九宫格"><img src="https://gitee.com/shenshilei1022/hugo_image_resource/raw/master/imgs/353.jpg" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="前端练习-九宫格"/></a><div class="content"><a class="title" href="/post/1ea5/" title="前端练习-九宫格">前端练习-九宫格</a><time datetime="2020-09-14T09:06:40.000Z" title="发表于 2020-09-14 17:06:40">2020-09-14</time></div></div><div class="aside-list-item"><a class="thumbnail" href="/post/7240/" title="LeetCode-组合(每日一题)"><img src="https://gitee.com/shenshilei1022/hugo_image_resource/raw/master/imgs/357.jpg" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="LeetCode-组合(每日一题)"/></a><div class="content"><a class="title" href="/post/7240/" title="LeetCode-组合(每日一题)">LeetCode-组合(每日一题)</a><time datetime="2020-09-08T07:13:45.000Z" title="发表于 2020-09-08 15:13:45">2020-09-08</time></div></div><div class="aside-list-item"><a class="thumbnail" href="/post/aeeb/" title="LeetCode-前K个高频元素(每日一题)"><img src="https://gitee.com/shenshilei1022/hugo_image_resource/raw/master/imgs/357.jpg" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="LeetCode-前K个高频元素(每日一题)"/></a><div class="content"><a class="title" href="/post/aeeb/" title="LeetCode-前K个高频元素(每日一题)">LeetCode-前K个高频元素(每日一题)</a><time datetime="2020-09-07T08:46:04.000Z" title="发表于 2020-09-07 16:46:04">2020-09-07</time></div></div></div></div></div></div></div></main><footer id="footer" style="background-image: url(https://gitee.com/shenshilei1022/hugo_image_resource/raw/master/imgs/115.JPG)"><div id="footer-wrap"><div class="copyright">&copy;2020 - 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